Mtjltiswitchibtg apparatus



O. ASMUSSEN.

MULTISWITCHING APPARATUS.

APPLICATION FILED NOV. 15. 1915. RENEWED NOV. 14,1919.

1,326, 126. I Patented Dec. 23,1919.

WITNESSES: INVENTOI? UNITED STATES PATENT orrron.

OTTO ASMUSSEN, OF BROOKLYN, NEW YORK.

MULTISWITCHING APPARATUS.

Application filed November 15, 1815, Serial No. 61,648. Renewed November 14, 1919. Serial No. 338,112.

To aZZ whom it may concern:

Be it'lrnown that I, O'rro AsMUssnN, a I

subject oi the King of Denmark, residing at Brooklyn, Kings county, and State of New York, have invented and discovered certain new and useful Improvements in Multiswitching Apparatus, of which the following is a specification.

The present invention relates to multiswitching apparatus for use in connection with telephone, telegraph, fire, and burglar alarm systems, and consists in the combinations and arrangements of parts hereinafter described and particularly set forth in the claims. r

The invention has for its purpose to provide an apparatus using current impulses for selecting and disconnecting at will the stations or subscribers of an automatic telephone or telegraph system for exchange purposes, and for testing and detecting troubles on the lines thereof. And wherein the'subscribers of a telephone service are enabled to establish their desired connections without the employment of manually operated switchboards.

Another object of the invention is to provide means for accomplishing interurban exchanges irom a trunk line into a number of small local telephone systems, whereby a central or a district station is established for operating connections into such trunk lines automatically.

A further. object of the invention is to lock out or connection with the local lines 7 all the intermediary subscribers on local systerns, and to look all local exchange stations out of connection with trunk lines as far as communication is being established, and thereby prevent any subscriber on a local system from hearing the calling and from overhearing the conversation, and also from being able to interrupt any'communicating parties.

The apparatus herein described is proposed as animprovement over that type of multi-switching apparatus disclosed in my co-pending application for U. S patent en titled Automatic; electrlc multl-switching,

testing and signaling systems, bearing the Serial No. 37 ,931, and dated July 3, 1915.

The invention is shown by way of illustration in the "accompanying drawings,

. whereinigurel is a diagrammatic view of a double coiled multi-switching apparatuswith the parts in normal position,

Fig. 12 adiagrammatic view of adouble coiled multi-switching apparatus with armatures and side magnet plungers, and with the parts in normal position, I

Fig. 3 a diagrammatic view of a single coiled iniilti-switching apparatus with small armatures and side plungers, and with the Specification of Letters Patent. Patented Dec. 23', 1919.

to the construction in detail,

poles with s polarity, when a certain direction of current passes through itscoils.

Two permanent magnet bars 6 and 7, each a serving as the armature at each end of the electromagnet poles, are both held 111 position by a cross bar 8 and by a circular contact wheel, or an arch shaped contact attachment 9 of non-magnetizable-material. .The' cross bar is pivoted at the center 10, allowingthe said permanent magnet bars and the contact wheel to move in an oscillatory way. 7

Said wheel'is provided with alternating conducting and insulating plates ll and 12, respectively, and the conducting plates are electrically connected together.

Those contactplates operate in union with the relatively fiXed'pairs of slide contacts 13 and 14:, the one contact is placed opposite the other with the conducting or insulating plates between. v

The polarity of the' electromagnets is changeable, according. to the direction of currents flowing through the coils, while in the permanent magnet bars the polarity is un changeable and permanently retained at the respective n and .9 poles of the bar.

- If the permanent magnet bars are attached to the four electromagnet coils poles in the 11121111161 demonstrated in the drawing, and

if a'current be passed through the saidjcoils, inducing those with the polarity as indlcated in Fig. 1, then the n pole of the ermanent'm'agnet bar 6 will, berepulsed 'y one of the electromagnets n poles, while that same permanent, magnet bars s pole, will be attracted toward the other 1D pole of the elec troma'gn'et' The permanent magnet bar 7,

at the lower electromagnet poles ends, is parallel with the magnet bar 6, and both have their n and s poles at the same ends,

and as bar 7 is acted upon by the electromagnets s poles, it will be attracted and repulsed in a way to cooperate with the bar 6, and the electromagnetic force is in that way doubled, as the said bars are acted upon by four poles.

A line current passing through said coils at and will energize the poles thereof, and attract the permanent magnet bars to the one side or the other, according to the oscillatory movement of the said contact wheel. Said conducting and insulating plates will thereby interpose alternately the fixed contact pairs. A current flowing through sald coils in an inverse direction will throw the permanent magnet bars, and with them the said contact wheel, over to the other side, or back again to its normal position, when the desired function of the automatic multiswitching system is attained.

The residual magnetism in the electro magnetic cores will keep, or bind, the switching attachment secure to the last side 1t has been shifted over to until affected by an mverse current impulse.

This multi-switching apparatus will not alone chan e the position of all the lines and wires leading to said contact pairs, exchang ing or interconnecting them with some other lines and connections, but it will lock itseli out of the main line connection after the current impulse has actuated the apparatus by shifting the switching attachment, and the current will, after being bridged over, flow out and continue its operating mission farther out on the main line, locking out station by station successively,

A main line current passing through contact pair 16 and the first windings of coils at. and 5 to earth, or to a second return current line, will, by rocking the contact at tachmentto the operating side 0, throw the insulatingplates 17 down to interpose contact pair 16, and thereby cut oil that connection. 'At'the same time, the conducting plates 19 will be thrown down between contact pair 49, and as that is in connection by wire 18 with the main line, the current will flow over that wire, over contact pair l9, wire 20, over armature 21, which atthat moment is attracted against post 22, 'over that post and over wire 23, and through said magnet coils to earth, or to the second line. This acting current is destined to set, or ratherto lock all the apparatusout of connection in this way and as far outas it has been predetermined.

As long as that looking out current is kept flowing by the operator through each indivgidualapparatuson the line (which dura-, tion is called the contact period), the cur rent will keep the armature v21 attracted against post 22. But the instant the contact period is interrupted, the said armature will fall back, and the next following current impulse will flow over that armature, over that armatures resting post 24, and out over the main line again. This operation is called, to look a 1nultiswitching apparatus or a station out of connection.

The act of looking a station out and controlling the operation of selecting the station wanted, is done by keeping the current flowing through the contact pair 16 during the sliding period of the switching attachment, 2'. c. the moment it takes'for the contact plates 26 to reach their limit or contact field, which is the moment the contact pair 16 strikes the insulated field 17 and the act of keeping the armature 21 attracted all the time during the operation, which is accomplished by opening the connection over contact pair 19 before it is closed over contact pair 16, and for that purpose the contact pair 419 is put nearer the end of its field than contact pair 16.

The small armatures are very important links in the whole system, for without their cooperation it would not be possible to accomplish such a number of difierent operations as can be attained by the apparatus herein described.

The operations of these multi-switching apparatus are effected by telegraph keys or selecting wheels by opening and closing the current, and by means of the above arrangement it is possible for the central stations'operator to control this looking out apparatus and to halt the operation when any wanted station has been reached. Connection is then made by another battery having another return passage and operating another additional apparatus.

The resetting of the apparatus will be effected by a current over a second line in an inverse direction through the. second windings of said electromagnet coils 4i and 5, and back through earth, or flowing out through earth back through the second winding and over the second line.

'By the looking out 01 those multi-switching apparatus, the contact pair 27 has been interposed by conducting contacts 29, which openedpassage for the resetting current,

which flows, above described, through the second winding of the magnet coils 4i and 5, effecting instantaneously the resetting of the apparatus, whereby conducting I contact plates 32 have been thrown down.

agaimand as those are connected with the line conducting the resetting current by wire 1 83, the resetting current will flow over contact pair 28 and out agam on the line or through earth to the nextstation to be reset. A's'there is no. armature arrangement to retain the current by the instituted contact perlods, except whereit is necessary to control the'resettingin the same way as by the looking out performance, the usual resetting is effected over the whole line, or as far as the apparatus have been locked out, by one depression of a key in a second. The resetting current will, of course, only affect the apparatus that have been set or locked out. As it will be seen, it cannot affect any other apparatus.

By reference to Fig. 2, it will be seen that the poles of the electromagnets are provided with pole pieces and side magnet plungers'. The pole pieces 3% and 35, at the lower ends of the coils, will actuate the armatures 36 and 37, and the side inductive bars 38 and 39 will attract the ends of the armatures to the one side, while the pole pieces will attract them to the other side, oscillating them on their pivots, and this method will operate the said armatures in a double and very strong way.

A one coiled double wound polarized electromagnet is represented in Fig. 3, that will be used to better effect than the one coiled polarized electromagnet described in the referred to pending application, and it is connected up and operated just in the same way as that represented in Fig. 2, except that the current in the present case has only to one coil. Both may be used with or without electromagnet plungers. Where plungers are used, those are connected with the permanent magnet bar with non-magnetizable metal or material.

It is obvious that those skilled in the art may vary the details of construction and arrangement of parts without departing from the spirit of the invention, and therefore I do not wish to be limited to such features except as may be required by the claims.

Having thus described my said invention, What I claim new and desire to secure by Letters Patent, is:

1. In a multi-switching apparatus the combination of an electro-magnet having two windings, a pair of permanent magnet bars associated with said magnet, a member mounted on said magnet bars having conducting and insulating sections, brush contacts engaging with said member, means for closing a circuit through one winding of the electro-ma-gnet to actuate said memher in one direction, and means for closing a circuit through the other winding of the electro-magnet to actuate said member in the opposite direction, substantially as set forth.

2. In a multi-switching apparatus the combination of an electro-magnet having two windings, a pair of permanent magnet bars associated with said magnet, a member mounted on said magnet bars having conducting and insulating sections, brush contacts for a main line. circuit engaging with sections of said member, conductors for closing a main line circuit through one Winding of the electro-magnet to actuate said member in one direction to break the circuit, and conductors for closing a resetting circuit through the other winding of the electro-magnet to actuate said member in the opposite direction to restore it to normal position, substantially as set forth.

3. In a multi-switching apparatus the combination of an electro-magnet having two windings, a pair of permanent magnet bars associated with said magnet, a member mounted on said magnet bars having conducting and insulating sections, brush contacts for a main line circuit engaging with sections of said member and adapted to close a circuit through one winding of the electro-magnet to actuate said member in one direction to break the circuit, an armature between the main line circuit and the electro-magnet operable to provide a current through the electro-magnet during the operation of said member, and conductor Wires for a resetting line circuit having brush contacts engaging with sections of said member and adapted to close a circuit through the other Winding of the electromagnet to actuate said member in the opposite direction to restore it to normal position, substantially as set forth.

4. In a multi-switching apparatus the combination of a pair of electro-magnets each having two windings, a pair of permanent magnet bars mounted to oscillateadjacent said electro-magnets, an arcuate member mounted on said magnet bars and having conducting and insulating sections, brush contacts for a main line circuit engaging with sections of said member and adapted to close a circuit through the electro-magnets to actuate the arcuate member in one direction to break the circuit, and means for closing a circuit through the electro-magnets to actuate said arcuate member in the opposite direction to restore it to normal position, substantially as set forth.

5. In a multi-switching apparatus the combination of a pair of electro-magnets each having two windings, a pair of permanent magnet bars mounted to oscillate adjacent said electro-magnets, a ring mounted on said magnet bars having conducting and insulating sections, brush cont-acts for a man line circuit engaging with sections of said ring and adapted to close a circuit through the electro-inagnets to actuate said ring in one direction to break the circuit, an armaturebetween the main line circuit and the electro-magnets operable to provide a current through the electro-magnets during the operation of said ring, and conductor wires for a resetting line circuit having brush contacts engaging with sections on the ring and adapted to close a circuit through the electro-magnets to actuate said ring in the opposite direction to restore it to normal position, substantially as set forth.

6; In a multi-switching apparatus the combination of a pair of electro-magnets each having two windings adjacently located and having like poles disposed at corre sponding ends, a pair of permanent magnet bars mounted to oscillate adjacent said electro-magnets and having like poles disposed at corresponding ends, a ring mounted on said magnet bars and having conducting and insulating sections, brush contacts for a main line circuit engaging with sections of said ring and connected to act on said permanent magnet bars by attraction and repulsion for opening and closing the circuit, and a second main line circuit connected to act on the poles of the electromagnets with opposite polarities to operate the ring to restore it to normal position,

substantially as set forth.

7. In a multi-switohing apparatus the combination of a pair of electro-magnets each having two windings adjacently located and having like poles disposed at corresponding ends, a pair of permanent magnet bars mounted .to oscillate between said electro-magnets and having like poles disposed at corresponding ends, a ring mounted on said magnet bars and having conducting and insulating sections, brush contacts for a main line circuit engaging with sections of said ring and adapted to close a circuitthrough the electro-magnets to actuate said ring in one direction to break the circuit, an armature between the main line circuit and the electro-Inagnets operable to provide a current through the electro-magnets during the operation of'said ring, and conductor wires for a resetting line circuit having brush contacts engaging with sections on the ring and adapted to actuate said ring in the opposite direction to restore it to normal position, substantially as set forth.

8. In a multi-switching apparatus the combination of a polarized electro-magnet having two windings, a pair of permanent magnet bars associated with said electromagnet, an arcuate member mounted on said magnet bars, means for closing a circuit through the electro-magnet, and the two permanent -magnet bars, one bar by two poles of the positive polarity and the other bar by two poles of the negative polarity thereby increasing the electro-magnetic force upon the arcuate member, substantially as set forth.

9. In a multi-switching apparatus, the combination of a polarized electro-magnet having two windings, a pair of permanent magnet bars located ad acent the electromagnet, an arcuate member mounted on said magnet bars and having conducting and insulating sections, fixed brush contacts to 'main lines and local wires engaging with said sections, to move the arcuate member and selectively interpose said conducting and insulating sections with the fixed brush contacts whereby to open and close a plurality of circuits simultaneously over said lines and wires, substantially as set forth.

In witness whereof, I have hereunto set my hand and seal at Brooklyn, New York, this 27th day of October, A. D. nineteen hundred and fifteen.

OTTO ASMUSSEN. [1,. s] Witnesses CHAs. M. DREYER, O. M. LAKIN. 

